Flora of North America species comparison

31-126 cm.

10-35 cm, erect or the bases decumbent;

nodes terete, 0-1 exserted.

closed for 1/2 - 7/8 their length;

ligules 0.1-1.7(2.1) mm, smooth or sparsely scabrous, truncate to obtuse;

blades 0.8-4.1 mm wide, flat, lax.

closed for 1/4-3/4 their length, terete, apices acuminate;

innovation blades 0.5-1(2) mm wide, involute, moderately thick, moderately firm, abaxial surfaces smooth or scabrous, adaxial surfaces usually densely scabrous or hispidulous;

cauline blades usually gradually reduced distally, 0.5-1(2) mm wide, flat, folded, or involute, thin, sometimes withering, abaxial surfaces smooth or scabrous, apices narrowly prow-shaped, sometimes the flag leaf blades vestigial.

mainly pseudointravaginal.

intra-vaginal.

11.4-36 cm, erect or lax, narrowly pyramidal, usually open, infrequently contracted;

nodes with (2)3-5(7) branches;

branches spreading, straight, angled, angles sparsely to moderately scabrous.

2-8 cm, erect, narrowly lanceoloid to ovoid, contracted, congested;

nodes with 1-2 branches;

branches 0.5-3 cm, erect, terete to angled, scabrous.

3.5-6.7 mm, laterally compressed;

florets 2-4;

rachilla internodes glabrous.

4-8 mm, lengths to 3 times widths, broadly lanceolate to narrowly ovate, laterally compressed, not sexually dimorphic;

florets 2-5;

rachilla internodes 0.5-1.2 mm, smooth or scabrous.

ovate, distinctly keeled, keels scabrous;

lower glumes 1-veined;

upper glumes shorter than or subequal to the lowest lemmas;

calluses webbed;

lemmas 2.7-4.2(5) mm, lanceolate, distinctly keeled, keels short-villous to about midlength, marginal and lateral veins glabrous, lateral veins obscure or moderately prominent, intercostal regions glabrous, smooth, apices acute;

paleas glabrous or ciliolate over the keels, apices finely scabrous;

anthers 0.4-0.8 mm.

lanceolate, distinctly keeled;

lower glumes 3-veined, distinctly shorter than the lowest lemmas;

calluses glabrous;

lemmas 4-7 mm, lanceolate, distinctly keeled, membranous, keels and marginal veins usually softly puberulent, sometimes short-villous, intercostal regions usually glabrous, infrequently softly puberulent proximally, lateral veins moderately prominent, margins glabrous, apices acute;

palea keels scabrous;

anthers mostly vestigial (0.1-0.2 mm), rarely 2-3 mm.

= unknown.

= unknown.